patch applied (ghc-6.12/ghc): Fix Trac #3591: very tricky
igloo at earth.li
Fri Oct 30 13:21:04 EDT 2009
Fri Oct 23 09:15:51 PDT 2009 simonpj at microsoft.com
* Fix Trac #3591: very tricky specialiser bug
There was a subtle bug in the interation of specialisation and floating,
described in Note [Specialisation of dictionary functions].
The net effect was to create a loop where none existed before; plain wrong.
In fixing it, I did quite a bit of house-cleaning in the specialiser, and
added a lot more comments. It's tricky, alas.
M ./compiler/basicTypes/Id.lhs -1 +6
M ./compiler/specialise/Specialise.lhs -173 +301
View patch online:
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